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Air 3500

Durability and comfort with 24 dB of noise reduction


Design focus on maximum noise reduction with minimum weight. The boom and earcup mountings are also used as the cord entrances to minimize the number of openings in the earcups. The size and shape of the earcups is optimized for broad-spectrum noise reduction. As a result, even the hard-to-manage low frequency noises are better attenuated.

Microphone Boom

Unlike some other headset designs, the microphone boom on the Air 3500 mounts to the bottom of the earcup rather than to the side. This assures unobstructed peripheral vision.

Quick-Set Pressure Settings

Three quick-set headset pressure settings let the user select the comfort/noise attenuation setting based on the amount of aircraft noise and personal comfort requirements. Dual-eccentric tension adjustment knobs allow the user to quickly and easily dial-in the desired setting. No tools are required for adjustment.


The Air 3500 features a comfortable foam-filled headband pad and ear cushions. The headband pad evenly distributes the headset weight, with no pressure points for maximum wearer comfort. The ear cushions combine comfort and light weight with excellent acoustic seal. An outer urethane layer ensures long life. All cushions are field-replaceable.


The microphone boom and microphone assembly may be worn on either side of the head. Users are able to control the volume in each ear with the separate volume controls for each ear.


Cadmium-bronze wire and tapered strain reliefs ensure long cord life. Polypropylene insulation over wires and urethane jacket for maximum durability. Shielded wire is used throughout for RFI and EMI protection.
Cord Length 5.5 ft (1.6764 m)
FAA TSO Approvals C57a and C58a
Frequency Response 350 Hz - 3 kHz
Impedance 150-600 Ω
Microphone Frequency Response 100 Hz - 3.5 kHz
Microphone Impedance 50-600 Ω
Microphone Sensitivity -55-(-51) dBV/Pa
Microphone Type Noise-Cancelling Electret Condenser
Noise Reduction ≤ 24 dB
Speaker Dynamic
Speaker Sensitivity 85-95 SPL/mW
Weight 13.44 oz (381 g)


Expand Images

Air 3500 Front 3.16 MB | November 6, 2014
Air 3500 Front Left 3.63 MB | November 6, 2014
Air 3500 Front Right 4.19 MB | November 6, 2014

Expand Manuals

Air 3500 Manual 616 KB | July 13, 2012

Expand Service Policies

Allgemeine Lieferbedingungen 184 KB | November 30, 2016
Asia/Pacific Service Policies 2.62 MB | September 4, 2018

Expand Technical data sheets

Air 3500 FAA TSO Approval 61 KB | July 25, 2012
Air 3500 Tech Sheet 248 KB | August 17, 2012

Expand Warranties

EMEA BT Service Policies 227 KB | June 11, 2018
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Telex is part of the Bosch Communications Systems family of brands, offering the world's most complete portfolio of professional audio and communications solutions.

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